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Observations on the transmission of Theileria mutans in South Africa
1981
De Vos, A.J. | Roos, J.A.
Theileria mutans, 4 isolates obtained from geographically distant parts of South Africa by subinoculation of infected blood were readily transmitted to cattle by Amblyomma hebraeum, all attempts to transmit these isolates with Rhipicephalus appendiculatus were unsuccessful
Show more [+] Less [-]Antibody kinetics in response to vaccination against Babesia bovis
1981
James, M.A. | Kuttler, K.L. | Levy, M.G. | Ristic, M.
Babesia bovis, cattle, kinetics of specific indirect fluorescent antibody test titers and total serum IgG and IgM values after vaccination and challenge exposure, nonspecific suppression of total IgG and IgM values coinciding with period of peak parasitemia
Show more [+] Less [-]Evidence, nature, and implications of the constitutive resistance to Trichinella spiralis in gallinaceous birds
1981
Barriga, O.O.
Trichinella spiralis, digestion of infective larvae is important constitutive mechanism of resistance in chickens that probably precludes transmission of infection by gallinaceous birds in nature
Show more [+] Less [-]Studies on a bovine Babesia transmitted by Hyalomma marginatum rufipes Koch, 1844
1981
Gray, J.S. | De Vos, A.J.
Babesia occultans n. sp. originally obtained from engorged female Hyalomma marginatum rufipes collected from cattle in Northern Transvaal, transmission studies in laboratory strain of ticks and splenectomized cattle, morphological, serological, and cross-immunity studies distinguished parasite as previously undescribed species highly infective for H. marginatum rufipes but of low virulence in cattle, unsuccessful attempt to transmit transovarially with Boophilus microplus
Show more [+] Less [-]Ecological studies on Ixodes (Afrixodes) matopi Spickett, Keirans, Norval & Clifford, 1981 (Acarina: Ixodidae)
1981
Colborne, J. | Norval, R.A.I. | Spickett, A.M.
Ixodes matopi, ecological study (microclimatic temperatures and relative humidities recorded in 4 habitats; seasonal and daily activity patterns; distribution of larvae, nymphs, and adults in different habitats)
Show more [+] Less [-]Some effects of 60CO irradiation on Cowdria ruminantium in its tick host Amblyomma hebraeum Koch (Acarina: Ixodidae)
1981
Amblyomma hebraeum, 60CO irradiation of nymphs failed to attenuate Cowdria ruminatium
Show more [+] Less [-]Efficacy of ivermectin against cutaneous Draschia and Habronema infection (summer sores) in horses
1981
Herd, R.P. | Donham, J.C.
Draschia, Habronema, horses, cutaneous infection (summer sores), efficacy of ivermectin
Show more [+] Less [-]Isolation and transmission of an unidentified Babesia sp. infective for cattle
1981
Thomas, S.E. | Mason, T.E.
Babesia sp. in Hyalomma marginatum rufipes, laboratory transmission to susceptible cattle achieved both biologically (tick feeding) and mechanically (injection of infected blood), low pathogenicity, apparently not transmissible to horses
Show more [+] Less [-]Theileria? taurotragi: A probable agent of bovine cerebral theileriosis
1981
De Vos, A.J. | Bessenger, R. | Banting, L.F.
Theileria? taurotragi, probable cause of death of 4 calves with cerebral theileriosis: Transvaal
Show more [+] Less [-]Plasma alpha-fetoprotein concentrations in pregnant cows exposed to Sarcocystis cruzi, Campylobacter fetus, or Aspergillus fumigatus
1981
Baetz, A.L. | Crandell, S.E. | Schmerr, M.J.F. | Barnett, D. | Bryner, J.H.
Sarcocystis cruzi, pregnant cows, plasma alpha-fetoprotein concentrations, cannot be used as diagnostic tool for fetal death
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